Bobbin



(No-Model.)

J. H. WELLS.

BOBBIN.

No. 399.589. Patented Mar. 12, 1889.

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N. PETERS. Pnmuma m hw. Washinglcn. u. c.

UNiTEn STATES PATENT OFFICE.

.I. HENRY ELLS, OF FALL RIVER, hlASSAC/HUSETTS.

BOBBIN.

SPECIFICATION forming part of Letters Patent No. 399,589, dated March 12, 1889.

Application filed February 15, 1888. Serial No. 264,156. (No model.)

To aZZ whom it may concern:

Be it known that I, J. HENRY ELLS, of Fall River, county of Bristol, and State of Massachusetts, have invented a n ew and useful Improvement in Bobbins; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming a part of the same, to be a description thereof.

The invention relates to ini 'iroven'ients in the bobbins of spinnii'ig-frames; and it consists in the construction and novel combina tion of parts hereinafter described, illustrated in the accompanying drawings, and pointed out in. the appended claims.

Figure l. of the drawings represents a perspective view of a bobbin embodying the invention. Fig. 2 represents an axial section of said bobbin.

The invention consists in strengthening the base portion of the bobbin, (preferably of wood,) which portion is particularly liable to wear and crack or break, by a metallic cap or double ferrule that will entirely cover the base edge, and will extend thence upward on the outer surface of the bobbin sufficiently far above a circumferential groove within the bobbin to permit the portion of the cap lining the inner portion of the bobbin to be spun into said groove without splitting or breaking the base portion above the cap.

Referring to the drawings by letter, A designates a bobbin of usual shape, having an enlarged conical base portion, (1, and the cy lindrical end portion, a. The lower end of the bore of the bobbin has conical and cylindrical end portions concentric with the similar parts of the enlarged base.

B is a circumferential groove in the cylindrical end part of the bore, a suitable distance below the junction of said part and the conical part of the bore. The said groove has its lower side preferably at right angles to the axis of the bobbin, which side constitutes the circumferential shoulder Z), the upper side of the groove inclining upward and inward th erefrom.

O is the strengthening base-cap or double ferrule, consisting of the central part, D, that lies closely against the lower or base edge of the bobbin, the outer flange, E, that extends upon the outer surface of the cylindrical end partof the bobbin far enough to overlie the groove B, an d the inner flange, F, that extends upward on the inner surface of the bobbin slightly above the shoulder Z).

The outer flange, E, extends considerably farther upward than the inner flange, for a reason hereinafter explained. The inner flange, F, is provided with an outwardly-extending flange, f, which lies upon the shoulder b of the groove B and prevents the withdrawal of the cap.

If desired, the outer flange may have the usual punched-in projection, G, to hold it to the bobbin and prevent it rotating thereon. This, however, is not absolutely necessary in the described construction, but may make a slight improvement therein.

As the bobbin is closed from end to end, it becomes necessary to spin the flange f upon the shoulder b of the groove B at the weakest part of the base portion on account of the presence of said groove. Now to spin out a flange as short as the flange f would require a dangerous amount of force exerted by the spinning-tool outward on the bobbin and at a point where the latter is weakened by the groove. A sufficient force would be liable to split or break the bobbin, especially if it had a fault at that point. This defect is remedied in the described construction by the outer flange extending, as shown, above the groove 13, or at least to the top thereof, so that when the cap is in place the weakest part of the base portion of the bobbin is re-enforced by an outer shell of metal, and cannot break or split under the pressure of the spinning-tool. Moreovenwhen the bobbin is complete and in use, the said weakened portion remains thus re-enforced, and the life of the bobbin is thus probably lengthened.

I do not claim a bobbin having its end portion protected by a cap and with a flange in the edge of the inner flange of said cap inserted in a circumferential groove in the illterior surface of the bobbin,'for, according to the state of the art, such construction is not new; but

What I claim as new, and desire to secure by Letters Patent, is

1. A bobbin composed of the ordinary tubular stem, having a circumferential inner groove near the lower on d of its bore, and a cap of sheet metal having a central portion lying against the lower or base edge of said stem or spindle, provided with an inner flange extending within said stem against the surface of the bore, and with its edge spun into said groove and bearing on the lower side thereof, and having an outer flange extending upward on the outer surface of the stem or spindle, and overlying the groove to re-enforce the stem on the outside of the groove, substantially as specified.

2. The herein-described bobbin composed of the ordinary tubular stem, A, having the enlarged cylindrical base portion a and the conical portion a, adjoining said cylindrical portion, and provided with the circumferential groove B, having the rectangular shoulder b in the cylindrical end portion of its bore, and the sheet-metal base-cap 0, having the central part, D, the outer flange, E, extending over the groove to re-enforce the bobbin there at, and the inner flange, F, lying against the surface of the bore, and having its edge turned outward upon the circumferential shoulder b of the groove B, substantn lly as specified.

J. HENRY ELLS. WVitnesses:

F. L. ALMY, GEORGE A. HYDE. 

